/*
 * Treeview 1.4.1 - jQuery plugin to hide and show branches of a tree
 * 
 * http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
 * http://docs.jquery.com/Plugins/Treeview
 *
 * SPDX-FileCopyrightText: © 2007 Jörn Zaefferer
 * 
 * SPDX-License-Identifier: MIT AND GPL-2.0-only
 *
 * Revision: $Id: jquery.treeview.js 5759 2008-07-01 07:50:28Z joern.zaefferer $
 *
 */

;(function($) {

  // TODO rewrite as a widget, removing all the extra plugins
  $.extend($.fn, {
    swapClass: function(c1, c2) {
      var c1Elements = this.filter('.' + c1);
      this.filter('.' + c2).removeClass(c2).addClass(c1);
      c1Elements.removeClass(c1).addClass(c2);
      return this;
    },
    replaceClass: function(c1, c2) {
      return this.filter('.' + c1).removeClass(c1).addClass(c2).end();
    },
    hoverClass: function(className) {
      className = className || "hover";
      return this.hover(function() {
        $(this).addClass(className);
      }, function() {
        $(this).removeClass(className);
      });
    },
    heightToggle: function(animated, callback) {
      animated ?
                this.animate({ height: "toggle" }, animated, callback) :
                this.each(function(){
                  jQuery(this)[ jQuery(this).is(":hidden") ? "show" : "hide" ]();
                  if(callback) {
                        callback.apply(this, arguments);
                  }
                });
    },
    heightHide: function(animated, callback) {
      if (animated) {
        this.animate({ height: "hide" }, animated, callback);
      } else {
        this.hide();
        if (callback) {
          this.each(callback);
        }                
      }
    },
    prepareBranches: function(settings) {
      if (!settings.prerendered) {
        // mark last tree items
        this.filter(":last-child:not(ul)").addClass(CLASSES.last);
        // collapse whole tree, or only those marked as closed, anyway except those marked as open
        this.filter((settings.collapsed ? "" : "." + CLASSES.closed) + ":not(." + CLASSES.open + ")").find(">ul").hide();
      }
      // return all items with sublists
      return this.filter(":has(>ul)");
    },
    applyClasses: function(settings, toggler) {
      // TODO use event delegation
      this.filter(":has(>ul):not(:has(>a))").find(">span").unbind("click.treeview").bind("click.treeview", function(event) {
        // don't handle click events on children, eg. checkboxes
        if ( this == event.target ) {
          toggler.apply($(this).next());
        }
      }).add( $("a", this) ).hoverClass();
            
      if (!settings.prerendered) {
        // handle closed ones first
        this.filter(":has(>ul:hidden)")
                        .addClass(CLASSES.expandable)
                        .replaceClass(CLASSES.last, CLASSES.lastExpandable);
                        
        // handle open ones
        this.not(":has(>ul:hidden)")
                        .addClass(CLASSES.collapsable)
                        .replaceClass(CLASSES.last, CLASSES.lastCollapsable);
                        
                // create hitarea if not present
        var hitarea = this.find("div." + CLASSES.hitarea);
        if (!hitarea.length) {
          hitarea = this.prepend("<div class=\"" + CLASSES.hitarea + "\"/>").find("div." + CLASSES.hitarea);
        }
        hitarea.removeClass().addClass(CLASSES.hitarea).each(function() {
          var classes = "";
          $.each($(this).parent().attr("class").split(" "), function() {
            classes += this + "-hitarea ";
          });
          $(this).addClass( classes );
        })
      }
            
      // apply event to hitarea
      this.find("div." + CLASSES.hitarea).click( toggler );
    },
    treeview: function(settings) {
            
      settings = $.extend({
        cookieId: "treeview"
      }, settings);
            
      if ( settings.toggle ) {
        var callback = settings.toggle;
        settings.toggle = function() {
          return callback.apply($(this).parent()[0], arguments);
        };
      }
        
      // factory for treecontroller
      function treeController(tree, control) {
        // factory for click handlers
        function handler(filter) {
          return function() {
            // reuse toggle event handler, applying the elements to toggle
            // start searching for all hitareas
            toggler.apply( $("div." + CLASSES.hitarea, tree).filter(function() {
              // for plain toggle, no filter is provided, otherwise we need to check the parent element
              return filter ? $(this).parent("." + filter).length : true;
            }) );
            return false;
          };
        }
        // click on first element to collapse tree
        $("a:eq(0)", control).click( handler(CLASSES.collapsable) );
        // click on second to expand tree
        $("a:eq(1)", control).click( handler(CLASSES.expandable) );
        // click on third to toggle tree
        $("a:eq(2)", control).click( handler() ); 
      }
        
      // handle toggle event
      function toggler() {
        $(this)
        .parent()
        // swap classes for hitarea
        .find(">.hitarea")
                        .swapClass( CLASSES.collapsableHitarea, CLASSES.expandableHitarea )
                        .swapClass( CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea )
        .end()
        // swap classes for parent li
        .swapClass( CLASSES.collapsable, CLASSES.expandable )
        .swapClass( CLASSES.lastCollapsable, CLASSES.lastExpandable )
        // find child lists
        .find( ">ul" )
        // toggle them
        .heightToggle( settings.animated, settings.toggle );
        if ( settings.unique ) {
          $(this).parent()
          .siblings()
          // swap classes for hitarea
          .find(">.hitarea")
          .replaceClass( CLASSES.collapsableHitarea, CLASSES.expandableHitarea )
          .replaceClass( CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea )
          .end()
          .replaceClass( CLASSES.collapsable, CLASSES.expandable )
          .replaceClass( CLASSES.lastCollapsable, CLASSES.lastExpandable )
          .find( ">ul" )
          .heightHide( settings.animated, settings.toggle );
        }
      }
      this.data("toggler", toggler);
            
      function serialize() {
        function binary(arg) {
          return arg ? 1 : 0;
        }
        var data = [];
        branches.each(function(i, e) {
          data[i] = $(e).is(":has(>ul:visible)") ? 1 : 0;
        });
        $.cookie(settings.cookieId, data.join(""), settings.cookieOptions );
      }
            
      function deserialize() {
        var stored = $.cookie(settings.cookieId);
        if ( stored ) {
          var data = stored.split("");
          branches.each(function(i, e) {
            $(e).find(">ul")[ parseInt(data[i]) ? "show" : "hide" ]();
          });
        }
      }
            
      // add treeview class to activate styles
      this.addClass("treeview");
            
      // prepare branches and find all tree items with child lists
      var branches = this.find("li").prepareBranches(settings);
            
      switch(settings.persist) {
        case "cookie":
           var toggleCallback = settings.toggle;
           settings.toggle = function() {
            serialize();
            if (toggleCallback) {
              toggleCallback.apply(this, arguments);
            }
           };
          deserialize();
       break;
        case "location":
           var current = this.find("a").filter(function() {
            return this.href.toLowerCase() == location.href.toLowerCase();
           });
          if ( current.length ) {
            // TODO update the open/closed classes
            var items = current.addClass("selected").parents("ul, li").add( current.next() ).show();
            if (settings.prerendered) {
                // if prerendered is on, replicate the basic class swapping
                items.filter("li")
                .swapClass( CLASSES.collapsable, CLASSES.expandable )
                .swapClass( CLASSES.lastCollapsable, CLASSES.lastExpandable )
                .find(">.hitarea")
                .swapClass( CLASSES.collapsableHitarea, CLASSES.expandableHitarea )
                .swapClass( CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea );
            }
          }
       break;
      }
            
      branches.applyClasses(settings, toggler);
                
      // if control option is set, create the treecontroller and show it
      if ( settings.control ) {
        treeController(this, settings.control);
        $(settings.control).show();
      }
            
      return this;
    }
  });
    
  // classes used by the plugin
  // need to be styled via external stylesheet, see first example
  $.treeview = {};
  var CLASSES = ($.treeview.classes = {
    open: "open",
    closed: "closed",
    expandable: "expandable",
    expandableHitarea: "expandable-hitarea",
    lastExpandableHitarea: "lastExpandable-hitarea",
    collapsable: "collapsable",
    collapsableHitarea: "collapsable-hitarea",
    lastCollapsableHitarea: "lastCollapsable-hitarea",
    lastCollapsable: "lastCollapsable",
    lastExpandable: "lastExpandable",
    last: "last",
    hitarea: "hitarea"
  });
    
})(jQuery);